Process of making leather washer-coils



(No Model.)

G. H. AVERY. PROCESS 0F MAKING LEATHER WASHER GOILS.

Patented June 11, 1889.

Ey Z223 N. PUERS. vmmvumognphr. washmgmn, DA cv UNITED STATES PATENT OFFICE.

cee

GEORGE H. AVERY, OF EAST HAMPTON, MASSACHUSETTS.

PROCESSA OF MAKING LEATHER WASHER-COILS.

SPECIFICATION formingpart of Letters Patent No. 404,949, dated June 11, 1889.

Application filed January 21, 1889. Serial No. 296,997. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE H. AVERY, a citizen of the United States, residing at East Hampton, in the county of Hampshire and State of Massachusetts, have invented new and useful Improvements in the Process of Making Leather Washer-Coils, of which the following isa specification.

This invention relates to a newr and improved process of forming washer-coils from a strip of leather, whereby the making of such coils is facilitated, and whereby the surface of the coil is improved and the solidity and enduring qualities of the washer are increased; and the invention consists, essentially, in winding a strip of leather on a mandrel and subjecting the strip forming theconvolutions of said coil to a solidifying pressure in a direction transversely of the length of the strip and in the direction of the axis of the coil.

The invention further consists in surfacerolling the spirally-wound strip while on the mandrel, all substantially as will hereinafter more fully appear, and be set forth in the claim.

In the accompanying drawings, in which similar letters of reference indicate corresponding parts in both views, a means for carrying out this improved process is illus trated, and Figure l is a side elevation of a machine for coiling leather strips, for com'- pressing the convolutions of the coil, and for surface-rolling the coil, as will hereinafter appear; and Fig. 2 is a cross-sectional elevation of the machine on the line w 0c, Fig. l.

In carrying out my invention the stripl of leather a,which is to form the coil b, of which one convolution is intended to form a washer when cut therefrom, is wound spirally on a mandrel d, supported in suitable bearings of uprights f g of a bed h in any suitable manner, as by confining one end of the strip to a collarj, fixed at a given point on the mandrel, said collar bearing against a head-stock Z, which is adapted for a free longitudinal movement with said mandrel in Ways of the bed h,said mandrel being capable of moving longitudinally in its bearings, its rotation being imparted thereto by a crank-arm m or other equivalent means. a weight p is attached and running over a .guiding-pulley supported in theV bed ofthe A cord n, to whichA at which the strip is wound upon the manv drel, its force toward such point compressing the convolutions the one upon the other, the degree of compression of course being regulated by the weight.

The surface and finish rolling of the coil is performed by means of a block t, having a concave face carried by an arm u, pivotally connected with a carriage u2, adapted to slide in ways of the bed, and said block is capable of being swung into and out of contact with the side of the coil, the pressure being imparted in the direction of the coil by a spring 'u or otherwise. A projecting handle w is provided on the carriage for convenience in presentin g the said block for'its nish-rollingon the outer surface of the coil at any or all parts of its length.

The coil may be removed by unloosening screw a', securing the collar j on the mandrel, and drawing the latter longitudinally from within the coil.

The process described, as is plain from the above description in connection with the con trivances illustrated, is most simple and easily performed.

What I claim as my invention is- The process of making a leather washercoil, which consists, first, in winding a strip of leather spirally on a mandrel; second,sub jecting said strip to a solidifying pressure in a direction transversely to the length of said strip, and, thirdly, finish-rolling the surfacek of the coiled strip, substantially as set forth.

' a GEORGE H. AVERY. Witnesses:

G. M. CHAMBERLAIN, WM. S. BELLoWs. 

